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The Thames & Kosmos Rock Tumbler Essential STEM Tool | Durable, Leak-Proof, Noise-Reducing Barrel, Built-in Timer | Polish & Shine Kids Rock Collections, Includes Authentic Specimens & Polishing Grits ...Read More >
Amazon [amazon.com] has 40-Oz Sip+Sea Cayman Stainless Steel Tumbler w/ Handle, Lid, & Straw (Seaweed) for $10.16. Shipping is free w/ Prime or on $35+. ...Read More >
Amazon [amazon.com] has Hydro Flask All Around Travel Tumbler w/ Straw & Handle (Reef) for $17.48 listed below. Shipping is free w/ Prime or on $35+. ...Read More >